2-(Bromomethyl)-3-(difluoromethyl)-5-(trifluoromethoxy)pyridine-4-sulfonamide
4-(Difluoromethyl)-5-methoxy-3-nitropyridine-2-sulfonamide
4-(Difluoromethyl)-6-methoxy-3-nitropyridine-2-sulfonamide
2-(Chloromethyl)-3-(difluoromethyl)-5-(trifluoromethoxy)pyridine-4-sulfonamide